Lifting truck



o. VIK

LIFTING TRUCK Filed Jan. 1s, 1931 g oct. 13, 1931.

1. .rl-r L.

Iw tu 11 wfg Patented Oct. 13, 1931 OLAV VIK, OF MINNEAPOLIS, MINNESOTALIFTIN G TRUCK Application led January 19, 1931." Serial No. 509,649.

This invention relates to lifting trucks for lifting and. transporting"stands on which goods are piled in a. mill or shop from one place toanother.

It is the ob`ect of this invention to provide a lifting trucfr of noveland improved design, which can be inexpensively made and can be readilyoperated.

. To kthis end the invention consists in the l@ novel. parts and novelcombinations of parts hereinafter defined in the claims and described inthe following specification, made in connection with. the accompanyingdraw- Y ings wherein like reference characters refer 'i5 to the same orsimilar parts throughout the variousl views and,I in which,

Fig. 1 is a plan View illustrating the lifting truck ofthe presentinvention;

Fig. 2 is a vertical section taken longitudimuy of the truck on the une2 2 of Fig. 1,

asV indicated by the arrows and illustrating certain of the movableparts in full lines in one position and in dotted lines in another rr*position;

2" Fig. 3 is a view in end elevation of the truck; and.

Fig. 4 is a view in side elevation of the truck placed under'a standadapted to be lifted and moved by the truck, certain of the parts of thetruck andthe stand being illustrated in full lines in one position andin dotted lines in another position.

Referring tothe drawings, in accordance withthe present invention, thereis provided a lower frame 4 which -is preferably of rectangular shapeand is of greater length than width. The frame 4 as illustrated, isformed from angle iron having vertical flanges forming the ends andsides of the frame and in- 40 wardly projecting horizontal flangesjoining the vertical. flanges at the upper edges thereof. Secured to thehorizontal flanges of the frame 4 at the four corners thereof andbelow'the horizontal flanges are plates 5 of i substantially triangularshape, which plates serve to brace and strengthen the frame 4 and 'formseats upon whichswivelled castors 6 are mounted. The castors 6 supportthe frame 4in spaced relation from the floor or theground' and at thesame time permit the truck to be moved from one place to another andsteered as it is moved. An upper frame 7 also preferably rectangular inshape is located above the frame 4 and is of the same length and widthas is the frame 4. The frame 7 is also preferably constructed from angleiron' and has vertical flanges forming the ends and sides of the frameand inwardly projecting horizontal flanges joinl ing the lower edges ofthe vertical flanges and adapted to rest on the horizontal flanges ofthe lower frame 4 when the upper frame 7 is in lowered relation relativeto the frame 4. Secured to the upper sides of the horizontal flanges ofthe upper frame 7 at the four 65 corners thereof, are plates 8 ofsubstantially triangular shape and these plates serve to brace andstrengthen the upper frame. Secured to the end horizontal flanges of theupj per frame 7 adjacent the two sides of the up- 70 per frame aredownwardly projecting pins 9, which'extend through openings in the endhorizontal flanges of the lower frame 4 and the lower plates 5. The pins9 have reduced portions adjacentv their upper ends which projectthroughthe horizontal end flanges of the upper frame 7 and are fixed in theupper plates 8 and the reduced upper portions of the pins form shoulderswhich bear against the bottom surfaces of the end horizontal flanges ofthe upper frame.

A pairof oppositely disposed bearings 10 are secured as by bolts 11 tothe central portions of the horizontal side flanges of the lower frame 4and a shaft 12 fits within these 85 bearings lOand extends transverselybelow and between the sides of the lower frame 4. The shaft 12 projectsbeyond one side of the frame 4 and has secured thereto, an arm 13 whichserves as a handle for rocking the shaft. A U-shaped stop member 14secured to the same side of the lower frame 4 cooperates with the handle13 to permit rocking movement of the shaft 12 through only slightly morethan Cams 15 are mount- 95 ed on the shaft 12 adjacent to but inwardlydisposed from the sides of the lower frame 4. Collars 16 are alsomounted on the shaft 12 to prevent lateral shift-ing movement of theshaft. The collars 16 abut the bearings 10. 100

Transverse shaftsor rods 17 are mounted in i and extend between thevertical side flanges of the lower frame 4 adjacent but inwardly Yspaced from the ends of the frame. These shafts 17 may be convenientlysecured to the Y vertical side flanges of the lower frame by the' otherVside of 3.0 so that thevtwo cylindricalportions 20a theremeans'ofoppositely disposedwjamb nuts 18 screw `threaded on the shafts f17.yPairsof spaced Collars 19 are mounted on the shafts 17 adjacent theends thereof but rinwardly disposed from the sides ofthe lowerframe:

will be swung' and these pairs of spaced collars are preferably insubstantial longitudinal alinement with the cams 15. Pivotally mountedadjacentreach end of the two shafts 1'T'betwe'en" pairs rof- `collars19'are levers 20* andeach lever20 has a'short outer arm extending belowvand bea-ring againstthe 4lower end of one of the pins 9. Each lever 20also has along inwardly extending arm terminating in'y a short upwardlyextending cylindrical portion 20a which bears against the'lower surfacevof one of the cams 15. `The long inl. wardly'extending armsofrthelevers 20 at ,one sideof the truck are so bentthat the twoxcylindricalportions 20o thereof may vboth bearagainst a singlecam 15,*whilesimilarly thel longv armsof 'the two levers 2O at 'the truck arelikewise bentof may bear againstthe lower surface of the Y other cam 15.

In Fig. 4 there is illustratedal stand A adapted` to be liftedandmoved-fromvone placeto;V another by-means ofy the present truck..The-fstand'A Vmayconsist merely of al A horizontal supporting; surface4 21 upon which goods are adapted to be piled and v spaced Ydownwardlyextending sides or legs 22`afdapted to hold they supportingsurface 21 inspaced relation a-b'ovef` the Hoor or ground,

`so that the truck of the presentinvention may be run'-sideward'belowthe supporting surface.: 21 and between the sides22. whenthe 1 upperfra'me 7 rests on-.the lower. frame y4.

When the upper frame. 7 of the'truck rests on the lowerframe 4, the cams,15 .will be upwardly swung' to the1 full line positions illustrated in-Figs, 1,2, 3f and.4'. lnthis rposition the-handle arml?) will engage oneside of` the'U-shapedstop memberf14. Of course',

, the levers `2() will take thevposition illustrat i edin fulllinesFigs. 1, 2,3 and 4. When Y inner arms of the; parts arci-n thisposition, the truck may beiv run 'u-nderne'ath the. stand A, whereuponthe arm 13-1nay be swung through slightly more` than 180 to engage ltheother 4side of theU-shaped stop"v member 14. .l The shaft-12 willaccordingly be rocked and thecams-15 willbe swungdownwardly to thedotted line positions shown in-Fi'gs.V 2, causing the'long the levers2()V to be depressed. The` short outer arms of the levers will be raisedand the'pinsv 9 willalso be raised thereby liftingthey upper frame l7and thestandA together with whateverY goods may be piledv upon thestand. The stand A'will be raised kso that the legs or' sides 22 areclear of the then be ground or floor'and the truck may 'pushed to theposition desired, whereupon the shaft 12 may be swung back to itsoriginal position to allowthe standv to be .again -lowered tofrestv onthe .licor or ground `and the truck can then bey moved from underneaththe stand.V As the shaft is rocked from one extremepositiontoxtheotherthe cams'15 gage the cams when the cams aredownwardlyswung to the dotted line position. l :There will thusbe no tendencyywhen the upperframe 7is. once lifted f r thepn'ppenframe to fallbackagain on the lower Vframe untilafter the lever 13 Itwill, ofcourse,be understood that varibemade in the form, details,

ous changes may arrangementandlproportions of the various parts withoutdeparting: from the. scope of therpresent invention.

What is claimed is 1. A..li fting truck comprising a, lower wheeledframe, an upper `frame normally resting kon 'said lower frame,alshaftmounted in said`v lower frame', arcam carriedzby said shaft,levers pivoted-in" said lower frame' andhaving arms bearing against saidcam.- and armsbearing. against portions of said upper fra-me, and meansfor swinging said shaft to rotatesaid camr and swing said levers toraise vsaid upperframefrom said lower frame.

v 2. kA, lifting: truck comprisingy a lower wheeled` sframe, an upperframe normally resting on said lower frame, a` shaft journaled in saidlower frame, arpairr'of cams carried by said shaft, four levers pivotedto said lower frame, said levers each having anarm bearing against oneof said cams and an'arm Lextending toa pointadj acent a corner of Ysaidupper framefandfbearing" against a portion ofsaid upper frame and meansforl swinging said shaft to swing said levers and thereby raise andlower. saidupperframe relative to said lower. frame.; V U. Y. '3.A-lifting truckcomprising alower'frame mounted on wheels, an upper frameVnormally resting on'said .lower frame, pins secured to said upperfra-me andl projecting downwardly throughopenings in said lower frame, ashaft journaled in Vsaid lower frameand extending transversely thereof,a pair of cams mounted on said shaft, levers pivotallyry mounted on saidlower-frame; and havingl armsV extending so that the points where the`oylindricalvportions 20a of the levers 20 enareslightly past dead centerbelow and bearing a ainst said cams and also having arms exten ing belowand bearing against said pins and means for swin ing said shaft to inturn swing said levers an thereby raise and lower said upper framerelative to said lower frame.

4. A lifting truck comprising a castor equipped lowerrectangular frame,a rectangular upper frame resting on said lower frame when in loweredposition, pins mounted in said upper frame adjacent the four cornersthereof and projecting downwardly through openings in said lower frame,a shaft journaled in said lower frame and extending transversely andcentrally thereof, a pair of shafts mounted respectively adjacent theends of said lower frame and extending transversely thereof, pairs oflevers pivotally mounted adjacent the ends of said klast two mentionedshafts and having inner arms extending below and bearing against saidcams and having outer arms bearing respectively against the lower endsof said pins and means for swinging said first mentioned shaft.

5. The structure defined in claim 4 and stop means limiting the swingingmovement of said first mentioned shaft to slightly more than 180.

6. A lifting truck comprising a lower frame of rectangular shape,castors supporting the four corners of said lower frame, an upper frameof rectangular shape supported on said lower frame when in loweredposition, members secured to said upper frame and 'projecting downwardlythrough openings in said lower frame, a. transverse shaft centrallyjournaled in said lower frame, a pair of cams mounted respectivelyadjacent the ends of said shaft, a pair of transverse shafts mounted insaid lower frame adjacent the ends thereof, levers pivoted on said lastmentioned shafts adjacent the ends thereof, the two levers adjacentsimilar ends of the two last mentioned shafts having inwardly 46extending'arms projecting below and bearingagainst one of said cams andthe levers 1 adjacent the other ends of the said two last mentionedshafts having inner ends bearing against the other of said two cams, theouter 50 ends of respective levers bearing against said respectivemembers and means for swinging said first mentioned shaft.

In testimony whereof I affix my signature.

OLAV VIK.

